Milling machine transmission and control mechanism



Jan. 4, 1944. R. K. LE BLOND ET AL I 2,338,121

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Filed Oct. 14, 1941 Jan. 4, 1944.

MILLING MACHINE TRANSMISSIONAND CONTROL MECHANISM 1S BY 1944. R. K. LE BLOND ET AL 8, 1.

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed OCt. 14, 1941 19 Sheets-Sheet 5 III INVENTORS. mum K. LEBLOND HARRY c.KEm=s Jan. 4, 1944.- R, K L BLOND E AL 2,338,121.

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet 6 N INVENTORS.

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MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, '1941 19 Sheets-Sheet 7 Y 1a A E INVENTORS. mama K. LE BLQND HARRY c. KEMPER n- 19 .4. 1 R.'K.LEBLOND m 2,338,121

MILLING MACHINE TRANSMISSION ANIP CONTROL MECHANISM F iled Oct. 14.1941 19 Sheets-Shea}; 8

j INVENTORS. RHZHARD K.L.EBLOND HARRT cxsmea BY QLQQMA Jan. 4, 1944. K LE BLOND ETAL I 2,338,121

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed 00%.. 14,1941 l9 Sheets-Sheet 9 INVENTORS. momma K. LEBLOHD BY HARR c. KEMPER \bmw. I

1944- R. K. LE BLOND ETAL 2,333,121

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet 1O INVENTORS. Rmumzn K. LEBLOND Hmuzx c. KEHPER ama; 5,

Jan. 4, 1944- R. K. LE BLOND ET AL 2,338,121

MILLINGMACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet ll INVENTORS. RmHARn K. LEBLOND HARRY c KEMPER Jan. 4, 1944. R. K. LE BLOND ET AL 2,333,121

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941- 19 Sheets-Sheet 12 INVENTORS. R\CHARD K. LZBLOND HARRY .c. KENPER Y mm 3% Jan. 4, 1944. R. K. LE BLOND ET AL 2,338,121

' MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Q01). 14, 1941 19 Sheets-Sheet l5 INVENTORS. RICHARD K.LEBLOND HARRT c. KENFER BY IQLQQM m Jan. 4, 1944. LE BLQND 2,338,121

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet 14 INVENTORS. RWHARD K. LEBLOND 3y w v HARRY C-KEMPER Jan. 4, 1944. R. K. LE BLOND ET AL MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM D mm mm fin mm W W mm Y m mm 7 mm m 0% 9 1 E M 2m m m .\M% w m 5 .m| F Sn 1, EN M3 :w mm 5 u 8m in #V emu r. v v Bum Ly 7M ZQZ m mg M aw W/ M M Q a a 8m n- 1944. R. K. LE BLO'ND ET AL 2,333,121

MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 SheetS Sheet 1's 'INVENTORS. REHARD K. LEBLOHD HARRT C. KEMPER BY LOLQQMA S 5 Jan. 4, 1944- R. K. LE BLOND ET AL MILLING MACHINE IR ANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet l7 INVENTORS. RlCHARD K.LE BLOND BY HARRY C.KE\\PER 44 R. K. LE BLOND ET AL 2,338,121

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MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Filed Oct. 14, 1941 19 Sheets-Sheet 19 INVENTORS. RICHARD K.LEBL0ND MIMI SM HARRT C.KEMP'ER Patented Jan. 4, 1944 MILLING MACHINE TRANSMISSION AND CONTROL MECHANISM Richard K. Le Blondand Harry G. Kemper, Cincinnati,.-hio, assignors to The R.-K. Le Blond Machine Tool Company, Cincinnati, Ohio, a

, corporation of Delaware Application October 14, 1941, Serial No. 414,962

6 Claims.

This invention pertains generally to transmissionand control mechanism for milling machines, and is especially related to suchmechanism for eilecting and controlling rotation of the spindle, tool or cutter and the movements of the knee, the saddle, and the table, of such milling machines, which are generally known as the knee, and saddle type milling machines.

This invention covers certain specific improvements in former apparatus for such milling machines in providing greater ease and facility in operating the various moving members of the machine and in controlling them with a minimum of fatigue, thought, and eftort upon'the' part of the operator performing machining operations in the machine tool. It is also an object to provide a greater range of cutting speeds for the tool spindle, and a greater degree of control for the work table so as to render the machine readily adaptable to the utilization of the most modern and up to date type of carbide cutting tools.

More specifically, an object of this invention is to provide a large speed variation for the tool spindle so as to cover a complete range of working speeds necessary in a modern milling ma-- chine to take full advantage of the latest types of cutting tool steels and carbides, while at the same time permitting a full range of machining for all types of materials to be cut on the machine. In this connection, it is an object to provide a series of change speeds for the tool spindle comprising two series of ranges, a high range having a series-of different speeds, and a low range having a series of different speeds, with the main object in mind of providing direct belt' driveto the cutter spindle for the high range of speeds and to provide direct gear drive to the cutter spindle when utilizing lower cutter spindle speeds.

' It is also an object, in utilizing this high speed direct belt drive and the low speed direct gear drive for the cutter spindle, to provide-means to facilitate changing the belts of the high speed direct belt drive to the cutterspindle while at the same time providing suitable arrangement in the machine to segregate the gear drive from the belt drive transmission so that thorough lubrication can be at all times applied to the gear drive transmission without in any way afiecting the belt drive arrangement. I

It is also an object of this-inventionto provide in a milling machine having a cutter spindle driven at relatively high speed by direct belt drive and at relatively low speed by direct gear drive, a simplified arrangement for removing the ,the cutter spindle. v

It is' also an object to arrange the universal belts from the belt driving mechanism without in any way dismantling any mechanical part of the machine to effect this change of belts.

It is also an object, in connection with this belt drive arrangement associated with the gear drive mechanism for thecutter spindle, .to so arrange the housing or columnfor the milling machine so that the belt drive will beat all times totally enclosed during the operation of the machine tool and yet readily accessible to the operator in the event that adjustment or. changing of the belt be necessary.

It is afurther object, in connection with this combined belt and gear drive for the cutter spin,- dle, to provide a single handle control mechanism for elTecting the selection of the direct drive high speed range or the direct gear drive low'speed range. This single lever control is associated with a single lever control mechanism for effecting the primary or smaller increments of speed variation for each of the belt and gear drives to joint drive shaft from the tool spindle transmission in the column to the Work feed transmission in the knee so that it will be totally enclosed by l the column and knee and will, be located substantially centrally thereof. V

Another object of this invention is to modify the conventional clutch and brake control lever for connecting or disconnecting maindrive power to the cutter spindle and feed transmission of the milling machine in that an additional lever is provided on the column of the machine tool located a height substantially that of the normal table height of the machine when in operation, and associated with the single lever range control and the single lever primary speed change control for the cutter spindle in order that it may be manipulated simultaneously with the manipulation of said single lever controlto facilitate changing of the spindle speeds.

Another object of this invention is to provide, in a milling machine having a tool spindle adapted to be driven at a series of different rates of speed and a work table," saddle, and kneeto be actuated at different rates of feeding, a single lever control mechanism comprising primary speed changes and main range offee'd changes each operated by a single'lever in such a way that the similar mechanism of substantially identical design, o eration, and appearance is provided for the tool spindle and the work table, saddle, and knee of the milling machine. 'In this way the similarity of the two speed changingde- 

